CA2512495A1 - Diversity system for measuring reception quality - Google Patents

Diversity system for measuring reception quality Download PDF

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Publication number
CA2512495A1
CA2512495A1 CA002512495A CA2512495A CA2512495A1 CA 2512495 A1 CA2512495 A1 CA 2512495A1 CA 002512495 A CA002512495 A CA 002512495A CA 2512495 A CA2512495 A CA 2512495A CA 2512495 A1 CA2512495 A1 CA 2512495A1
Authority
CA
Canada
Prior art keywords
reception quality
measurement system
reception
receiver
indicator
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Granted
Application number
CA002512495A
Other languages
French (fr)
Other versions
CA2512495C (en
Inventor
Eric Auffret
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
InterDigital CE Patent Holdings SAS
Original Assignee
Individual
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Publication of CA2512495A1 publication Critical patent/CA2512495A1/en
Application granted granted Critical
Publication of CA2512495C publication Critical patent/CA2512495C/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

Links

Classifications

    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0802—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection
    • H04B7/0817—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with multiple receivers and antenna path selection
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/20—Monitoring; Testing of receivers
    • H04B17/23—Indication means, e.g. displays, alarms, audible means
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/20—Monitoring; Testing of receivers
    • H04B17/24—Monitoring; Testing of receivers with feedback of measurements to the transmitter
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B17/00—Monitoring; Testing
    • H04B17/30—Monitoring; Testing of propagation channels
    • H04B17/309—Measuring or estimating channel quality parameters
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04B—TRANSMISSION
    • H04B7/00—Radio transmission systems, i.e. using radiation field
    • H04B7/02—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas
    • H04B7/04—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas
    • H04B7/08—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station
    • H04B7/0802—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection
    • H04B7/0805—Diversity systems; Multi-antenna system, i.e. transmission or reception using multiple antennas using two or more spaced independent antennas at the receiving station using antenna selection with single receiver and antenna switching

Landscapes

  • Engineering & Computer Science (AREA)
  • Computer Networks & Wireless Communication (AREA)
  • Signal Processing (AREA)
  • Physics & Mathematics (AREA)
  • Electromagnetism (AREA)
  • Quality & Reliability (AREA)
  • Mobile Radio Communication Systems (AREA)
  • Monitoring And Testing Of Transmission In General (AREA)
  • Radio Transmission System (AREA)

Abstract

To assist an operator to position a wireless camera (CSF) so that a base station (SB) receives with good quality a radiofrequency signal (S) transmitted from a transmitter (EC) linked to the camera, several measurers (M1-MK) linked to diversity receivers (R1-RK) of the signal each determine whether a characteristic of the signal via the respective receiver satisfies a reception criterion (TH). In the base station, a counter (COM) counts the receivers satisfying the reception criterion, and a divider (DIV) establishes a reception quality indicator (QR) dependent on the number of satisfactory receivers so as in particular to retransmit it via a return channel (VR) to the camera so that it can be displayed thereon.

Claims (10)

1 - Measurement system for measuring the reception quality of a predetermined radiofrequency signal transmitted from a transmission means (EC) to several receiver means (R1-RK), characterized in that it comprises:
- several measurer means (M1-MK) respectively linked to the receiver means (R1-RK) each to determine whether a characteristic of the predetermined signal (S) received by the respective receiver means satisfies a predetermined reception criterion (TH), - a counting means (COM) to count a number of satisfactory receiver means in which the reception criterion is satisfied, and - an indicator means (DIV) to establish a reception quality indicator (QR) depending on.the number of satisfactory receiver means.
2 - Measurement system as in claim 1, in which the counting means (COM) and the indicator means (DIV) are included in a central measurement means (SB) linked to the receiver means (R1-RK).
3 - Measurement system as in claim 2, in which a display (ASB) of the measurement means displays the reception quality indicator (QR).
4 - Measurement system as in one of claims 1 to 3, in which the transmission means (EC) and the receiver means (R1-RK) operate in space diversity or in frequency diversity or in polarization diversity or in time diversity.
5 - Measurement system as in any of claims 1 to 4, comprising a return radio channel (VR) over which the reception quality indicator (QR) is transmitted via a transmitter means (ESB, AE) to a reception means (RC) linked to the transmission means (EC) in order to display thereon (AC, VC) the reception quality indicator (QR).
6 - Measurement system as in any of claims 1 to 5, comprising several cellular receiver means (RC1-RCQ) each including several measurer means, a counting means and an indicator means in order to establish and transmit respective reception quality indicators (QR1-QRQ) to the central measurement means (SBe).
7 - Measurement system as in claims 5 and 6, in which the reception quality indicators (QR1-QRQ) are retransmitted over the return radio channel (VR) from the transmitter means (ESB, AE) to the receiver means (RC).
8 - Measurement system as in claim 6 or 7, in which the reception quality indicators (QR1-QRQ) are displayed (ASB) in the base station.
9 - Measurement system as in claim 8, in which the reception quality indicators (QR1-QRQ) are displayed on a map respectively in correspondence with the locations of the cellular receiver means (RC1-RCQ) on the map.
10 - Measurement system as in any of claims 1 to 9, in which the transmission means (EC) is linked to a mobile wireless camera (CSF).
CA2512495A 2003-01-10 2003-12-22 Diversity system for measuring reception quality Expired - Fee Related CA2512495C (en)

Applications Claiming Priority (3)

Application Number Priority Date Filing Date Title
FR0300221 2003-01-10
FR0300221A FR2849970A1 (en) 2003-01-10 2003-01-10 DIVERSITY RECEPTION QUALITY MEASUREMENT SYSTEM
PCT/EP2003/014734 WO2004064269A1 (en) 2003-01-10 2003-12-22 Diversity system for measuring reception quality

Publications (2)

Publication Number Publication Date
CA2512495A1 true CA2512495A1 (en) 2004-07-29
CA2512495C CA2512495C (en) 2012-06-05

Family

ID=32524804

Family Applications (1)

Application Number Title Priority Date Filing Date
CA2512495A Expired - Fee Related CA2512495C (en) 2003-01-10 2003-12-22 Diversity system for measuring reception quality

Country Status (8)

Country Link
US (1) US7430429B2 (en)
EP (1) EP1582011B1 (en)
JP (1) JP4335815B2 (en)
AT (1) ATE538541T1 (en)
AU (1) AU2003293970A1 (en)
CA (1) CA2512495C (en)
FR (1) FR2849970A1 (en)
WO (1) WO2004064269A1 (en)

Families Citing this family (3)

* Cited by examiner, † Cited by third party
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JP4643462B2 (en) * 2006-02-08 2011-03-02 株式会社東芝 Radio and polarization switching method
DK1885072T3 (en) * 2006-08-03 2012-04-23 Oticon As Method and system for visual indication of the function of wireless receivers and a wireless receiver
US10419139B2 (en) * 2017-11-01 2019-09-17 Ford Global Technologies, Llc Vehicle camera signal strength indicator

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US4628321A (en) * 1982-04-14 1986-12-09 Harris Corporation Aperture transformation sidelobe canceller
GB2196211B (en) * 1986-09-12 1990-07-04 British Broadcasting Corp Communications system
US5263175A (en) * 1990-09-28 1993-11-16 Motorola, Inc. Diversity repeater diagnostic method and apparatus
JP3527791B2 (en) * 1995-04-28 2004-05-17 トヨタ自動車株式会社 Malfunction antenna detection method and apparatus
GB2307375A (en) * 1995-11-20 1997-05-21 British Broadcasting Corp Mobile Radio Communication System with Diversity Reception
CA2188845A1 (en) * 1996-10-25 1998-04-25 Stephen Ross Todd Diversity Antenna Selection
US5856809A (en) * 1997-01-22 1999-01-05 Texas Intruments Incorporated Static antenna tuning and antenna voltage measurement
US5940454A (en) * 1997-12-17 1999-08-17 Nortel Networks Corporation Blind switch diversity control apparatus
US6615024B1 (en) * 1998-05-01 2003-09-02 Arraycomm, Inc. Method and apparatus for determining signatures for calibrating a communication station having an antenna array
US6683567B2 (en) * 2000-07-18 2004-01-27 Brian De Champlain Single receiver wireless tracking system
JP3732364B2 (en) * 1999-08-27 2006-01-05 松下電器産業株式会社 Communication terminal apparatus and channel estimation method
US6587686B1 (en) * 1999-12-14 2003-07-01 Telefonaktiebolaget L M Ericsson (Publ) Method and apparatus for detecting base station transceivers malfunctions
EP2139069B1 (en) * 1999-12-15 2011-04-13 Nippon Telegraph And Telephone Corporation Adaptive array antenna transceiver apparatus
DE10032426B4 (en) * 2000-07-04 2006-01-12 Siemens Ag Beamforming method
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JP2002176666A (en) * 2000-12-05 2002-06-21 Sony Corp Mobile communication system
JP3543323B2 (en) * 2001-02-14 2004-07-14 日本電気株式会社 Base station transmission control method, cellular system and base station
EP1253736A3 (en) * 2001-04-26 2003-12-10 NTT DoCoMo, Inc. Data link transmission control for mobile communications
JP4016647B2 (en) * 2001-05-17 2007-12-05 日本電気株式会社 Mobile communication system, base station, mobile station, threshold setting method used therefor, and program thereof
US7203508B2 (en) * 2001-06-13 2007-04-10 Ntt Docomo, Inc. Mobile communication systems, mobile communication methods, base stations, mobile stations, and signal transmission methods in the mobile communication systems
JP2003078462A (en) * 2001-08-31 2003-03-14 Sanyo Electric Co Ltd Radio equipment, its signal receiving method, its filter coefficient measuring method and filter coefficient measurement program thereof
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Also Published As

Publication number Publication date
ATE538541T1 (en) 2012-01-15
CA2512495C (en) 2012-06-05
JP2006524441A (en) 2006-10-26
WO2004064269A1 (en) 2004-07-29
EP1582011A1 (en) 2005-10-05
AU2003293970A1 (en) 2004-08-10
US7430429B2 (en) 2008-09-30
FR2849970A1 (en) 2004-07-16
US20060141936A1 (en) 2006-06-29
EP1582011B1 (en) 2011-12-21
JP4335815B2 (en) 2009-09-30

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Effective date: 20201222